VDRS20M040BSE

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VDRS20M040BSE Application Field and Working Principle

The VDRS20M040BSE is a varistor or “transient voltage suppressor” (TVS) that is used to protect against voltage spikes, static electricity, and other forms of electrical surge. It is designed to quickly divert transient overvoltages from sensitive components like microelectronics, MOSFETs, ICs, and connectors. With a maximum clamping voltage of 18V, it is most often used as a signal or power line protection device in automotive, telecom, industrial, and consumer electronics applications.

The VDRS20M040BSE is a surface-mount TVS device that is formed by dissolving a Zinc Oxide synthetic dielectric material in a certain half wave modified sine wave form. The surface-mount component features a wide operating temperature range of -55°C to 130°C. When exposed to a transient overvoltage, the varistor rapidly dissipates it in the form of heat, meaning that the device does not need additional insulation to protect against mains interference or lightning strikes.

The varistor’s working principle is based on the inverse voltage absorption properties of the Zinc Oxide dielectric material. When exposed to a transient overvoltage, the voltage across the TVS device increases rapidly, resulting in a positive charge carrier accumulation on the opposite surface. This charge is then discharged, redistributing the energy and providing a low voltage clamping value.

In terms of application, the VDRS20M040BSE is generally used to provide protection in various power and signal circuits that require low impedance protection and high peak surge current. This includes industrial communication links in instrumentation, process control systems, and process monitoring systems. It is also used in automotive electrical/electronic systems, telecommunications, consumer/office electronics, as well as various other applications.

The varistor’s wide operating temperature range and low clamping voltage make it suitable for use in many environments, including locations that are subject to extreme temperatures and harsh electrical environments. The device also features a low leakage current, meaning that it can be used in systems that require very little current loss. Furthermore, it is designed to meet the stringent requirements of conformity standards such as AEC-Q200 and SGS-RoHS.

Overall, the VDRS20M040BSE is a highly reliable varistor that provides excellent protection against transient overvoltages. It is a cost-effective and easy to implement solution for a variety of signal and power line protection applications and is rated for shocks up to 16KV.

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